Greater London · England
External & façade joints in South Lambeth, Greater London
External mastic for South Lambeth and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Joints pointed up with cement by mistake
- Joints where the bead has come unstuck
- Movement joints with cracked, split or missing sealant
External mastic for homes and businesses in South Lambeth
On houses, flats and commercial buildings across South Lambeth, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. We work on brickwork movement joints, copings & trims and façade panels, and common reasons people get in touch are rain getting behind render or cladding at a joint and plants rooting in failed movement joints.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall.
Each job carries a 12-month guarantee, large or small.
- Place
- South Lambeth (SW8, SW9, SW1P)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we cannot put right
A few problems are outside what sealant work can do:
- Subsidence or other structural problems
- Walls that need new movement joints cut into them
- Loose or hollow render, which needs re-rendering
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
What we seal
- Concrete & block
- Joints between brick and frames
- Copings & trims
- Façade panels
- Render & cladding joints
- Brickwork movement joints
How to look after the new joints
To keep the joints looking good and working properly:
- Check the sealant is paintable before painting near it
- Fix overflowing gutters above sealed joints
- Show decorators and builders where the movement joints are
- Keep movement joints as flexible joints, not mortar
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
Questions from South Lambeth
Can parking be tricky for a visit in South Lambeth?
Parking in South Lambeth, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Is South Lambeth in your area for external mastic?
Yes, South Lambeth is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we’ll send you a clear quote.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Will the old sealant be removed?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Will there be a smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so it does not stand out.
Places near South Lambeth
What else we do in South Lambeth
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the building. For a job in South Lambeth, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
Getting a quote
If you’re in South Lambeth and need external mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Advice
External mastic in South Lambeth: local notes
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. With historic houses such as Buckingham Palace (about 1.8 miles north-west) nearby, there’s older building stock in the area around South Lambeth as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
If you let a flat or house near Vauxhall station, split movement joints are easy to miss on a rental until damp shows inside. If you look after a building such as Herbert Morrison Primary School, larger buildings have long runs of movement joint that eventually need resealing.
South Lambeth is about 1 mile south-west of Kennington, in Greater London. If you need external mastic in South Lambeth, please ring 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Greater London. Across Greater London, we cover 764 places, and South Lambeth is one of them.
Here we cover the SW8, SW9 and SW1P postcode area for external mastic. Whether your property is on Lett Road, Rita Road and Lorn Road or a nearby road, we can help. You will find South Lambeth on the A203, which makes it straightforward to reach with everything needed for external mastic. Nearby, we also carry out external mastic in Little Portugal (1 mile south), Kennington (1 mile north-east), Oval (1 mile north-east), North Brixton (1 mile south-east) and Stockwell (1 mile south). We also work in nearby towns such as City of Westminster (3 miles north-west), Marylebone (3 miles north), Kensington (4 miles north-west), St Pancras (3 miles north), Shoreditch (4 miles north-east) and Walthamstow (9 miles north-east).
Around South Lambeth
In South Lambeth, that means homes and buildings near Lambeth Palace Library, Vauxhall Park and Durand Academy. You will also find The Canton Arms (under half a mile south-east) and Platanos College (under half a mile south-east). The closest station to South Lambeth is Vauxhall station, roughly 0.6 miles north of the centre. Well-known places in the area include Gabriel's Wharf (2.2 miles north) and The Gordon Hospital (1.1 miles north-west). The countryside around South Lambeth includes Bellenden Road Nature Garden and Battersea Park Lake.
Landlord and commercial work in South Lambeth
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
For anyone letting property in or around South Lambeth, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
What affects the quote in South Lambeth
The price is agreed before any work begins. It takes into account:
- The product the joint needs
- Working hours on commercial sites
- How easy the joints are to reach
- Mould in or behind the old joints
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- Whether it has been sealed before
- Where the property is
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Common problems we fix in South Lambeth
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
Most people get in touch when they notice one of these:
- Water getting into walls through failed joints
- Leaking joints around cladding and façade panels
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
If you live in an older home near St Stephen's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Comparing quotes
- What guarantee comes with the work
- Whether you can choose the colour
- Whether all the old sealant comes out first
- What product goes in the joint